SF: 11. Perhpas drop ISO reference

section 11: Saying that an ISO thing is "good to follow" is quite weak IMO. (And is that ISO spec accessible? Hmm... it seems that one needs to accept cookies to get it which is wonderfully ironic;-) If the authors have the energy, I'd suggest trying to find better guidance that's more publically available in a privacy-friendly manner. (Or just drop the ISO reference if 6973 is good enough.)